SuperGuards: Any piece (including Kings and pawns), which is observed by another piece of the same color cannot be captured. Pinned pieces also observe.
Take&Make: Having captured, a unit must immediately, as part of its move, play a non-capturing move in imitation of the captured unit from the capture-square. If no such move is available, the capture is illegal. Promotion by capture occurs only when a pawn arrives on the promotion rank as the result of a take&make move. Checks are as in normal chess: after the notional capture of the checked K, the checking unit does not move away from the King’s square.
No.1506Vlaicu Crișan &
S.K.Balasubramanian Romania / India original – 14.05.2020
Four pairs of pieces exchange functions: Rc7/Bc6, Re4/Bf7, Rd4/Be8 and Re7/Bd5.
All the moves are 100% Take&Make specific.
Full orthogonal-diagonal correspondence.
The first and the last moves are played by the same piece capturing a white piece on the same
square. Each move is made possible by the previous move(s), so the interplay is highly genuine.
The main strategic motif is line clearance: both Kings have to move to a7 and a8 along the
thematic lines a7-g7/a8-g2, swapping their final places in the twins. For these journeys the white
Bishop and Rook have to reach the adjacent squares to black King (g2 and g7).
Apparently the black Rook and Bishop are already ideally placed on the right squares (e7 and
d5) to guide the white K to the destination. Actually they have to be first annihilated and
replaced by their siblings on the same squares.
Both mates are Superguards specific: Black captures the guarding unit of the white King and
moves to a square (b7) from where it guards the black King.
Thanks Luce. It was really a very hard labour put in especially by Vlaicu.
— Bala
shankar ram
May 16, 2020 21:16
Both Ks transported to their final squares alternately on the lines g2-a8 and g7-a7.
A total of 7 pieces thematically captured in each solution to reach the final position with only the Ks and a BB/BR.
Typical T&M sacrifices and teleportation all over the board.
Another fine addition to the joint work of the Indo-Romanian duo.
Line Diagram:
S K Balasubramanian
May 17, 2020 15:37
Dear NSR,
Thank you very much for your valuable comments.
Regards,
— Bala
seetharaman kalyan
May 18, 2020 17:54
Very nice Superguard effects in the last two moves. I wonder if a6 can be white to add some more apparent choice to both.
Superb! Congratulations to the authors
Thanks Luce. It was really a very hard labour put in especially by Vlaicu.
— Bala
Both Ks transported to their final squares alternately on the lines g2-a8 and g7-a7.
A total of 7 pieces thematically captured in each solution to reach the final position with only the Ks and a BB/BR.
Typical T&M sacrifices and teleportation all over the board.
Another fine addition to the joint work of the Indo-Romanian duo.
Line Diagram:
Dear NSR,
Thank you very much for your valuable comments.
Regards,
— Bala
Very nice Superguard effects in the last two moves. I wonder if a6 can be white to add some more apparent choice to both.
Thanks for the suggestion. Unfortunately, with a wPa6 the solution in a) would not work any more because White can play 5.Kxb6→b5.
Oh.. yes I missed that b5 needs guard !!
with a6 as wP, wK can escape in (a) with 5.K*b6-b5,b4.